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Universe’s accelerated expansion might be slowing down

Universe’s accelerated expansion might be slowing down

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Universe's accelerated expansion might be slowing down

The universe is still expanding at an accelerating rate, but it may have slowed down recently compared to a few billion years ago, early results from the most precise measurement of its evolution yet suggested Thursday.

While the preliminary findings are far from confirmed, if they hold up it would further deepen the mystery of dark energy and likely mean there is something important missing in our understanding of the cosmos.

These signals of our universe’s changing speeds were spotted by the Dark Energy Spectroscopic Instrument (DESI), which is perched atop a telescope at the Kitt Peak National Observatory in the US state of Arizona.

Each of the instrument’s 5,000 fibre-optic robots can observe a galaxy for 20 minutes, allowing astronomers to chart what they have called the largest-ever 3D map of the universe.

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Scientists have been able to map six million galaxies and quasars using light that stretches up to 11 billion years into the universe’s past.

“We measured the position of the galaxies in space but also in time, because the further away they are, the more we go back in time to a younger and younger universe,” Arnaud de Mattia, a co-leader of the DESI data interpretation team, told AFP.

Just one year into its five-year survey, DESI has already drawn up a map which includes six million galaxies and quasars using light that stretches up to 11 billion years into the universe’s past.

The results were announced at conferences in the United States and Switzerland on Thursday, ahead of a series of scientific papers being published in the Journal of Cosmology and Astroparticle Physics.

DESI is on a mission to shed light on the nature of dark energy — a theoretical phenomenon thought to make up roughly 70 percent of the universe.

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Another 25 percent of the universe is composed of the equally mysterious dark matter, leaving just five percent of normal matter — such as everything you can see.

An inconstant constant?

For more than a century, scientists have known that the universe started expanding after the Big Bang, 13.8 billion years ago.

But in the late 1990s, astronomers were shocked to discover it has been expanding at an ever-increasing rate.

This was a surprise because gravity from matter — both normal and dark — was thought to have been slowing the universe down.

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But obviously something was making the universe expand at ever-faster speeds, and the name “dark energy” was given to this force.

More recently, it was discovered that the acceleration of the universe significantly sped up around six billion years after the Big Bang.

In the push-and-pull between matter and dark energy, the latter certainly seems to have the upper hand, according to the leading model of the universe called the Lambda CDM.

Under this model, the quickening expansion of the universe is called the “cosmological constant,” which is closely linked to dark energy.

DESI director Michael Levi said that so far, the instrument’s early results were showing “basic agreement with our best model of the universe”.

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“But we’re also seeing some potentially interesting differences which could indicate that dark energy is evolving with time,” Levi said in a statement.

In other words, the data “seems to show that the cosmological constant Lambda is not really a constant,” because dark energy would be displaying “dynamic” and changing behaviour, De Mattia said.

Slowing down in old age

This could suggest that — after switching into high gear six billion years after the Big Bang — the speed at which the universe has been expanding has been “slowing down in recent times,” DESI researcher Christophe Yeche said.

Whether dark energy does in fact change over time would need to be verified by more data from DESI and other instruments, such as the space telescope Euclid.

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But if it was confirmed, our understanding of the universe will likely have to be changed to accommodate for this strange behaviour.

For example, the cosmological constant could be replaced by some kind of field linked to some as-yet-unknown particle.

It could even necessitate updating the equations of Einstein’s theory of relativity “so that they behave slightly differently on the scale of large structures,” De Mattia said. But we are not there yet.

The history of science is full of examples in which “deviations of this type have been observed then resolved over time,” De Mattia emphasised.

After all, Einstein’s theory of relativity has withstood more than a century of scientific poking and prodding and still stands stronger than ever. 

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Microsoft to invest 2.2bn dollars in cloud and AI services in Malaysia

Microsoft to invest 2.2bn dollars in cloud and AI services in Malaysia

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Microsoft to invest 2.2bn dollars in cloud and AI services in Malaysia

Microsoft (MSFT.O) said on Thursday it will invest $2.2 billion over the next four years in Malaysia to expand cloud and artificial intelligence (AI) services in the company’s latest push to promote its generative AI technology in Asia.

The investment, the largest in Microsoft’s 32-year history in Malaysia, will include building cloud and AI infrastructure, creating AI-skilling opportunities for 200,000 people, and supporting the country’s developers, the company said.

“We want to make sure we have world class infrastructure right here in the country so that every organisation and start-up can benefit,” Microsoft Chief Executive Satya Nadella said during a visit to Kuala Lumpur.

Microsoft will also work with the Malaysian government to establish a national AI Centre of Excellence and enhance the nation’s cybersecurity capabilities, the company said in a statement.

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Prime Minister Anwar Ibrahim, who met Nadella on Thursday, said the investment supported Malaysia’s efforts in developing its AI capabilities.

Microsoft is trying to expand its support for the development of AI globally. Nadella this week announced a $1.7 billion investment in neighbouring Indonesia and said Microsoft would open its first regional data centre in Thailand.

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Nvidia supplier SK Hynix says HBM chips almost sold out for 2025

Nvidia supplier SK Hynix says HBM chips almost sold out for 2025

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Nvidia supplier SK Hynix says HBM chips almost sold out for 2025

South Korea’s SK Hynix (000660.KS) said on Thursday that its high-bandwidth memory (HBM) chips used in AI chipsets were sold out for this year and almost sold out for 2025 as businesses aggressively expand artificial intelligence services.

“The HBM market is expected to continue to grow as data and (AI) model sizes increase,” Chief Executive Officer Kwak Noh-Jung told a news conference. “Annual demand growth is expected to be about 60% in the mid-to long-term.”

SK Hynix which competes with U.S. rival Micron (MU.O) and domestic behemoth Samsung Electronics (005930.KS) in HBM was until March the sole supplier of HBM chips to Nvidia, according to analysts who add that major AI chip purchasers are keen to diversify their suppliers to better maintain operating margins. Nvidia commands some 80% of the AI chip market.

Micron has also said its HBM chips were sold out for 2024 and that the majority of its 2025 supply was already allocated. It plans to provide samples for its 12-layer HBM3E chips to customers in March.

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“As AI functions and performance are being upgraded faster than expected, customer demand for ultra-high-performance chips such as the 12-layer chips appear to be increasing faster than for 8-layer HBM3Es,” said Jeff Kim, head of research at KB Securities.

Samsung Electronics (005930.KS) which plans to produce its HBM3E 12-layer chips in the second quarter, said this week that this year’s shipments of HBM chips are expected to increase more than three-fold and it has completed supply discussions with customers. It did not elaborate further.

Last month, SK Hynix announced a $3.87 billion plan to build an advanced chip packaging plant in the U.S. state of Indiana with an HBM chip line and a 5.3 trillion won ($3.9 billion) investment in a new DRAM chip factory at home with a focus on HBMs.

Kwak said investment in HBM differed from past patterns in the memory chip industry in that capacity is being increased after making certain of demand first.

By 2028, the portion of chips made for AI, such as HBM and high-capacity DRAM modules, is expected to account for 61% of all memory volume in terms of value from about 5% in 2023, SK Hynix’s head of AI infrastructure Justin Kim said.

Last week, SK Hynix said in a post-earnings conference call that there may be a shortage of regular memory chips for smartphones, personal computers and network servers by the year’s end if demand for tech devices exceeds expectations.

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The Nvidia (NVDA.O) supplier and the world’s second-largest memory chipmaker will begin sending samples of its latest HBM chip, called the 12-layer HBM3E, in May and begin mass producing them in the third quarter.

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Qualcomm jumps as AI sparks rebound in Chinese smartphone market

Qualcomm jumps as AI sparks rebound in Chinese smartphone market

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Qualcomm jumps as AI sparks rebound in Chinese smartphone market

Qualcomm (QCOM.O) shares rose 4% in premarket trading on Thursday after the smartphone-focused chipmaker signaled an AI-fueled rebound in demand, especially in China, after a two-year slump.

Sales to Chinese smartphone makers jumped 40% in the first half of its fiscal year, the company said on Wednesday, as buyers there gravitate toward higher-priced devices that can accommodate AI chatbots.

“Chinese vendors who traditionally relied more on MediaTek, are going to start leveraging Qualcomm’s high-end chips more as they push hard into the AI Agenda,” said IDC analyst Nabila Popal.

“They further represent an upside for Qualcomm because majority of the recovery is also going to be driven by Chinese OEMs this year, coming from a tough last two years.”

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Qualcomm on Wednesday projected third-quarter sales that were above estimates as it also benefits from its IoT (Internet of things) and auto segments.

The company, the biggest supplier of smartphone chips, was on course to add more than $8 billion to its market value based on premarket movements. Other semiconductor firms such as Arm and Broadcom (AVGO.O) rose 2.8% and 2.4%, respectively.

According to preliminary data from research firm IDC, in the high-end segment, the AI buzz and the foldable products allowed the Android smartphone vendors to further differentiate themselves from Apple (AAPL.O) and garnered increased interest from Chinese consumers in the first quarter of 2024.

“We’re optimistic that numbers can be driven higher, given last year’s muted Android cycle and the likelihood of IoT(internet of things) improvement as inventory normalizes,” analysts at Wolfe Research said.

At least 14 analysts raised their price targets on Qualcomm, according to LSEG data.

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Qualcomm’s shares have gained 13.5% this year following a 31.5% rise in 2023.

Shares of Apple, which is set to report earnings after market closes on Thursday, were up 1.05% in premarket trading.

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